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Laser-driven proton acceleration enhancement by the optimized intense short laser pulse shape

Souri, S ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1063/1.4982611
  3. Abstract:
  4. Interactions of two distinct shapes of the pulses namely positive/negative chirped pulse and fast/slow rising-edge pulse with plasma are studied using particle-in-cell simulation. It is found that, for a pulse duration of 34 fs and intensity a0 = 12, proton acceleration could be enhanced by asymmetric pulses with either pulse envelope or pulse frequency modification. The number of accelerated protons, as well as the proton energy cut-off, is increased by asymmetric pulses. In this work, for positive chirped pulse, electrostatic field at the rear side of the target is improved by about 30%, which in turns leads to an increase in the proton energy cut-off more than 40%. Moreover, in contrary to the fast pulses, the slow one could enhance the proton energy cut-off up to 65% for 34 fs pulse with 20 fs rising-edge. © 2017 Author(s)
  5. Keywords:
  6. Chirp modulation ; Plasma simulation ; Chirped pulse ; Particle-in-cell simulations ; Positive/negative ; Proton acceleration ; Pulse durations ; Pulse envelopes ; Pulse frequencies ; Short laser pulse ; Laser pulses
  7. Source: Physics of Plasmas ; Volume 24, Issue 5 , 2017 ; 1070664X (ISSN)
  8. URL: https://aip.scitation.org/doi/10.1063/1.4982611